Hi, noob here. I’ve been riding/commuting a long time but have recently taken it on my self to do my own maintenance. Things are going pretty well, but I can’t get my front derailleur tuned just the way I like.

Don’t laugh. I ride a Nishiki Anasazi (my last bike, a Trek DS 8.3, was recently stolen and I got the Nishiki for $175 down from $500). It’s an 8 speed with a three cog crankset. The front derailleur is a Shimano Tourney (entry level, I’m assuming).

I’m able to get about two out of the three crank cogs tuned the way I like, but not all three. One or the other outer- or innermost speeds rubs. There’s also some rubbing in the highest gear of the second cog. The derailleur height looks good; the alignment looks good. Any tips? Should I just upgrade?